450 West 20th Street, Manhattan
Co-op · 4 units · built c. 1855 · Block 717, Lot 69.
Building permits
No building permits on file for this lot.
Property taxes
- Assessment
- $1,520,100
- 2026–27 tax
- $76,186
- Market value (city estimate)
- $3,378,000
- Taxable value
- $612,474
- Assessed land
- $614,250
- Assessed improvements
- $905,850
Zoning
R7B: floor area ratio 2.82 built, 3.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard. FEMA’s preliminary map: zone AE, high risk: a 1% chance of flooding each year, base flood elevation 10 ft (NAVD88).
Recent sales
- Jan 21, 2026: $1,195,000
- May 20, 2022: $1,150,000
- Aug 17, 2021: $1,615,000
- Oct 22, 2019: $1,255,000
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Chelsea Historic District (Historic District). 5 Landmarks Preservation Commission permits are on file.